A study on the micelle and phase separation behavior of NIPAM-ODA copolymer in aqueous solution

To study the micelle and phase separation behavior of amphiphilic copolymer in aqueous solution which is temperature-sensitive, the copolymer of N-isopropylacrylamide (NIPAM) and octadecyl acrylate(ODA) was synthesized, The micelle behavior of the copolymer was studied by drop weight method and fluorescence probe method respectively, Simultaneously, the phenomenon of LCST (Lower Critical Solution Temperature) of the copolymer in aqueous solution with the increase of temperature was also studied by using fluorescence probe method, Results showed that, the phase separation came into being in the aqueous solution of the copolymer when temperature was increased to its LCST, The pi-A isotherms of the molecule of the copolymer as insoluble monolayer on water surface was obtained by L-B method. The abnormal phenomenon that the monolayer of the copolymer got coacervative more and more with the increase of the temperature was observed. It further indicated that the phase separation of the copolymer occured from another method, This phenomenon was also discussed in detail.